US9297469B2 - Valve seat assemblies - Google Patents

Valve seat assemblies Download PDF

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Publication number
US9297469B2
US9297469B2 US13/895,973 US201313895973A US9297469B2 US 9297469 B2 US9297469 B2 US 9297469B2 US 201313895973 A US201313895973 A US 201313895973A US 9297469 B2 US9297469 B2 US 9297469B2
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US
United States
Prior art keywords
valve seat
seal
cage
valve
valve body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US13/895,973
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English (en)
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US20140264138A1 (en
Inventor
Brandon Wayne Bell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fisher Controls International LLC
Original Assignee
Fisher Controls International LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US13/828,539 external-priority patent/US9267604B2/en
Application filed by Fisher Controls International LLC filed Critical Fisher Controls International LLC
Priority to US13/895,973 priority Critical patent/US9297469B2/en
Assigned to FISHER CONTROLS INTERNATIONAL LLC reassignment FISHER CONTROLS INTERNATIONAL LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BELL, BRANDON WAYNE
Priority to CN201410090069.8A priority patent/CN104048051B/zh
Priority to CN201420112626.7U priority patent/CN204061942U/zh
Priority to MX2015012968A priority patent/MX363329B/es
Priority to JP2016500928A priority patent/JP6336028B2/ja
Priority to CA2905286A priority patent/CA2905286C/en
Priority to EP14718801.5A priority patent/EP2971881A2/en
Priority to AU2014241307A priority patent/AU2014241307B2/en
Priority to BR112015022127A priority patent/BR112015022127A2/pt
Priority to RU2015141356A priority patent/RU2664051C2/ru
Priority to PCT/US2014/022255 priority patent/WO2014159156A2/en
Priority to KR1020157028799A priority patent/KR101769289B1/ko
Publication of US20140264138A1 publication Critical patent/US20140264138A1/en
Priority to NO20151189A priority patent/NO343562B1/en
Publication of US9297469B2 publication Critical patent/US9297469B2/en
Application granted granted Critical
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Adjusted expiration legal-status Critical

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K25/00—Details relating to contact between valve members and seat
    • F16K25/005—Particular materials for seats or closure elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/48—Spanners; Wrenches for special purposes
    • B25B13/50—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/48—Spanners; Wrenches for special purposes
    • B25B13/481—Spanners; Wrenches for special purposes for operating in areas having limited access
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/24—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same mounting or demounting valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
    • F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
    • F16J15/125—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement generally perpendicular to the surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
    • F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
    • F16J15/126—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement consisting of additions, e.g. metallic fibres, metallic powders, randomly dispersed in the packing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • F16K1/427—Attachment of the seat to the housing by one or more additional fixing elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings
    • F16K1/465—Attachment of sealing rings to the valve seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/243—Packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/246—Combination of a sliding valve and a lift valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0402—Cleaning, repairing, or assembling
    • Y10T137/0491—Valve or valve element assembling, disassembling, or replacing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/598—With repair, tapping, assembly, or disassembly means
    • Y10T137/6065—Assembling or disassembling reciprocating valve

Definitions

  • This disclosure relates generally to valves and, more particularly, to valve seat assemblies.
  • a sliding stem valve generally includes a flow control member (e.g., a plug) coupled to a stem.
  • An actuator may drive the stem to move the flow control member between an open position and a closed position to allow or restrict fluid flow between an inlet and an outlet of the valve.
  • the flow control member forms a fluid seal against a valve seat when the flow control member is in the closed position to prevent fluid flow through the valve.
  • An example apparatus includes a valve seat assembly including a cage and a valve seat coupled to the cage.
  • the valve seat assembly is to be disposed in a valve body.
  • the example apparatus also includes a seal having a first side, a second side, a third side and a fourth side. The first side, the second side and the third side are to be in contact with the valve seat assembly, and the fourth side is to be in contact with the valve body.
  • Another example apparatus disclosed herein includes a valve seat assembly including a first portion movable relative to a second portion. A seal is to be compressed between the first portion and the second portion, and a valve body is to receive the valve seat assembly. The seal is to be compressed between the valve seat assembly and the valve body to form a fluid seal.
  • An example method disclosed herein includes compressing a seal between a first surface and a second surface of the valve seat assembly.
  • the valve seat assembly includes a valve seat and a cage.
  • the example method further includes compressing the seal between a third surface of a valve body and a fourth surface of the valve seat assembly.
  • Another example apparatus disclosed herein includes a bracket to engage a portion of a valve seat suspended in a valve body via a cage.
  • the example apparatus also includes a hanger rotatably coupled to the bracket.
  • the hanger is to suspend the bracket in the valve body.
  • the bracket is to be rotated to move at least the portion of the valve seat relative to the cage to compress a seal.
  • Yet another example apparatus disclosed herein includes means for engaging a valve seat coupled to a cage disposed in a valve body.
  • the example apparatus also includes means for suspending the means for engaging in the valve body and means for rotatably coupling the means for suspending to the means for engaging.
  • the means for engaging is to enable rotation of the valve seat relative to the cage to compress a seal.
  • FIG. 1 illustrates an example valve disclosed herein.
  • FIG. 2 illustrates an example valve seat assembly of the valve of FIG. 1 .
  • FIG. 3 illustrates an example seal of the valve seat assembly of FIG. 2 .
  • FIG. 4 illustrates another example valve seat assembly disclosed herein.
  • FIG. 5 illustrates an example valve seat adjustment apparatus disclosed herein.
  • FIG. 6 illustrates the example valve seat adjustment apparatus of FIG. 5 operatively coupled to the example valve seat assembly of FIG. 4 .
  • FIG. 7 illustrates the example valve seat adjustment apparatus of FIGS. 5-6 engaging the valve seat assembly of FIG. 4 .
  • FIG. 8 illustrates another example valve seat assembly disclosed herein.
  • FIG. 9 illustrates a flowchart representative of an example method disclosed herein.
  • any part e.g., a layer, film, area, or plate
  • any part is in any way positioned on (e.g., positioned on, located on, disposed on, or formed on, etc.) another part
  • the referenced part is either in contact with the other part, or that the referenced part is above the other part with one or more intermediate part(s) located therebetween.
  • Stating that any part is in contact with another part means that there is no intermediate part between the two parts.
  • An example valve seat assembly may include a valve seat suspended in a valve body via a cage.
  • the valve seat assembly includes a seal to provide a fluid seal between the valve seat assembly and the valve body. Three sides of the seal may be in contact with the valve seat assembly, and one side of the seal may be in contact with the valve body.
  • the valve body includes a tapered portion to gradually compress the seal between the valve seat assembly and the valve body.
  • a first portion of the valve seat assembly is movable relative to a second portion of the valve seat assembly, and the seal is disposed between the first portion and the second portion.
  • the first portion when the valve seat assembly is disposed in the valve body, the first portion may be moved relative to the second portion to compress the seal along two, substantially perpendicular axes to enable the seal to provide a fluid seal against the valve body.
  • FIG. 1 illustrates an example valve 100 disclosed herein. While the following examples are described in conjunction with the example valve 100 of FIG. 1 , the example methods and apparatus disclosed herein may be implemented using other valves such as, for example, one or more valves described in U.S. application Ser. No. 13/599,762, entitled “Valve Seat Apparatus for Use with Fluid Valves,” filed on Aug. 30, 2012 and/or U.S. application Ser. No. 13/828,539, entitled “Valve Seat Apparatus for Use With Fluid Valve,” filed Mar. 14, 2013, which are hereby incorporated by reference herein in their entirety.
  • the valve 100 includes a valve body 102 defining a fluid flow passageway 104 between an inlet 106 and an outlet 108 .
  • the example valve 100 includes a valve seat assembly 110 .
  • the valve seat assembly 110 includes a valve seat 112 , a cage 114 and a seal 116 .
  • the example cage 114 of FIG. 1 includes a flange 118 to support the cage 114 on a lip 120 of the valve body 102 adjacent a bonnet 122 .
  • the bonnet 122 is coupled to the valve body 102 via a plurality of fasteners 124 (e.g., bolts) and engages the flange 118 of the cage 114 to retain the cage 114 within the valve body 102 .
  • the example valve seat 112 of FIG. 1 is suspended in the valve body 102 via the cage 114 .
  • the example cage 114 facilitates maintenance, removal and/or replacement of valve trim components such as, for example, a plug 125 , a stem 126 , etc.
  • the cage 114 defines a bore 128 to receive fluid from the inlet 106 and guide movement of the plug 125 .
  • the plug 125 may move between a closed position in which the plug 125 sealingly engages the valve seat 112 and an open position in which the plug 125 is sealingly disengaged from the valve seat 112 (e.g., spaced apart from the valve seat 112 ).
  • the example cage 114 provides lateral stability, balance and alignment as the plug 125 moves between the open position and the closed position, thereby reducing vibrations and/or other mechanical stress.
  • the example cage 114 defines at least one opening 130 in fluid communication with the bore 128 .
  • fluid may flow from the inlet 106 into the bore 128 and through at least a portion of the opening 130 of the cage 114 to the outlet 108 .
  • the plug 125 sealingly engages the valve seat 112 and obstructs the opening 130 to prevent fluid flow through the valve 100 .
  • the example valve 100 employs a plug 125
  • other examples may employ other closure or flow control members such as, for example, a piston.
  • the cage 114 facilitates and/or provides certain fluid flow characteristics through the valve body 102 (e.g., reducing noise and/or cavitation generated by the flow of fluid through the valve 100 ).
  • the cage 114 may be other sizes and/or shapes, define different number(s) and/or types of opening(s), etc. to provide particular, desired fluid flow characteristics such as, for example, to control fluid flow, reduce noise and/or cavitations, enhance pressure reductions of the fluid, etc.
  • An actuator (not shown) is coupled to the plug 125 via the stem 126 . The actuator moves the plug 125 between the open position and the closed position to control fluid flow through the fluid flow passageway 104 .
  • FIG. 2 is an enlarged view of the example valve seat assembly 110 of FIG. 1 .
  • the cage 114 includes first threads 200 and the valve seat 112 includes second threads 202 to engage the first threads 200 .
  • the valve seat 112 is movably coupled to the cage 114 via the first threads 200 and the second threads 202 .
  • the seal 116 prevents fluid flow (e.g., leakage) between the valve body 102 and the valve seat assembly 110 .
  • the example seal 116 is disposed in a space 204 (e.g., a groove, a recess, etc.) defined by the valve seat assembly 110 . More specifically, the space 204 is defined by an end 206 of the cage 114 , a first portion 208 of the valve seat 112 , and a flange 210 of the valve seat 112 .
  • the flange 210 is coupled to the valve seat 112 .
  • the valve seat 112 and the flange 210 are integral.
  • the first portion 208 of the valve seat 112 has a first outer diameter less than a second outer diameter of the flange 210 .
  • the outer diameter of the flange 210 is approximately equal to an outer diameter of the example cage 114 .
  • a first surface 212 e.g., a surface defining an inner diameter
  • a second surface 214 e.g., a surface defining outer diameter
  • the example valve seat 112 includes a shoulder 216 (e.g., a tapered portion, a rounded edge, etc.) to facilitate assembly of the seal 116 and the valve seat 112 .
  • the shoulder 216 may provide a clearance to enable the seal 116 to be placed or rest on a ledge 218 of the flange 210 via the shoulder 216 .
  • the valve seat 112 may then be threaded into the cage 114 to form (e.g., assemble) the valve seat assembly 110 .
  • the seal 116 is in contact with the end 206 of the cage 114 and the flange 210 .
  • the seal 116 is clamped (e.g., held and/or compressed) between the end 206 of the cage 114 and the flange 210 prior to the valve seat assembly 110 being coupled to the valve body 102 .
  • the seal 116 may be clamped between the end 206 of the cage 114 and the flange 210 by disposing the seal 116 on the end 206 of the cage 114 or on the ledge 218 of the flange 210 and threading the second threads 202 of valve seat 112 onto the first threads 200 of the cage 114 .
  • the flange 210 moves toward the cage 114 , and the flange 210 clamps (e.g., holds and/or compresses) the seal 116 against the end 206 of the cage 114 .
  • the seal 116 is substantially held in place and/or compressed via four sides of the seal 116 , and the seal 116 does not float in the space 204 (e.g., the seal 116 substantially does not move in the space 204 relative to the valve seat assembly 110 and/or the valve body 102 ).
  • the cage 114 defines a first step 220 between the first threads 200 and the end 206 .
  • the example valve seat 112 defines a second step 222 between the second threads 202 and first portion 208 of the valve seat 112 .
  • the first step 220 and the second step 222 function as a stop.
  • the first step 220 may contact the second step 222 to substantially limit further threading and, thus, movement of the valve seat 112 .
  • the first step 220 and second step 222 prevent compression of the seal 116 between the end 206 of the cage 114 and the flange 210 beyond a threshold amount of compression.
  • a wall 224 of the example valve body 102 of FIG. 2 is shaped to gradually compact or compress the seal 116 between the valve body 102 and the valve seat 112 to load the seal 116 as the valve seat assembly 110 is lowered into the valve body 102 .
  • Loading the seal 116 involves subjecting the seal 116 to a given amount of mechanical stress to enable the seal 116 to form a fluid seal between at least two surfaces (e.g., between the first portion 208 of the valve seat 112 and the wall 224 of the valve body 102 ).
  • the wall 224 of the valve body 102 defines a first bore 226 , a tapered portion 228 and a second bore 230 .
  • a size of a space in the valve body 102 in which the valve seat assembly 110 is received decreases from the first bore 226 to the second bore 230 via the tapered portion 228 .
  • the seal 116 contacts (e.g., slides along and/or against) the tapered portion 228 of the wall 224 , and the seal 116 compresses or compacts between the tapered portion 228 of the wall 224 and the first portion 208 of the valve seat 112 .
  • the seal 116 is urged to expand toward the end 206 of the cage 114 and the ledge 218 of the valve seat 112 . Because the seal 116 is in contact with the end 206 of the cage 114 and the ledge 218 , the seal 116 compresses between the end 206 of the cage 114 and the ledge 218 .
  • the example seal 116 is compressed between four surfaces (e.g., the end 206 of the cage 114 , the ledge 218 , the valve body 102 and the first portion 208 of the valve seat 112 ). As the valve seat assembly 110 is further lowered into the valve body 102 , the seal 116 is further compressed or compacted along the tapered portion 228 of the wall 224 . When the valve seat assembly 110 is fully lowered into the valve body 102 (e.g., when the flange 118 of the cage 114 rests on the lip 120 of the valve body 102 ), the seal 116 is compressed or compacted between the second bore 230 of the wall 224 and the valve seat 112 . In this manner, the example seal 116 loads and forms a fluid seal between the valve seat assembly 110 and the valve body 102 .
  • four surfaces e.g., the end 206 of the cage 114 , the ledge 218 , the valve body 102 and the first portion 208 of the valve seat 112 .
  • the seal 116 includes a first side 232 , a second side 234 , a third side 236 and a fourth side 238 .
  • first side 232 and the second side 234 of the example seal 116 contact the end 206 of the cage 114 and the flange 210 of the valve seat 112 , respectively.
  • the third side 236 (e.g., defined by the first surface 212 ) and the fourth side 238 (e.g., defined by the second surface 214 ) contact the valve seat 112 and the wall 224 of the valve body 102 , respectively.
  • FIG. 3 is an enlarged, cross-sectional view of the example seal 116 of FIGS. 1-2 . While the example seal 116 of FIG. 3 is described in conjunction with the example valve seat assembly 110 of FIGS. 1-2 , the example seal 116 of FIG. 3 may be used to implement the example seal of FIG. 4 and the example seal of FIG. 8 described below.
  • the example seal 116 of FIG. 3 includes a first section 300 , a second section 302 and a third section 304 disposed between the first section 300 and the second section 302 .
  • the example first section 300 and the example second section 302 include braided graphite foil reinforced with InconelTM.
  • the first section 300 and the second section 302 are coupled to opposing sides of the third section 304 .
  • the first section 300 defines the first side 232 of the seal 116
  • the second section 302 defines the second side 234 of the seal 116 .
  • the third section 304 includes graphite foil formed via a die.
  • the above-noted number of sections, materials and construction techniques are merely examples and, thus, other numbers of sections, materials and/or construction techniques may be employed without departing from the scope of this disclosure.
  • the example seal 116 of FIG. 3 has a rectangular cross-sectional shape, other example seals may have other cross-sectional shapes such as, for example, circular, elliptical, etc.
  • the valve 100 may be subjected to a variety of process temperatures.
  • components of the valve 100 e.g., the valve seat 112 , the cage 114 , the valve body 102 , etc.
  • the example seal 116 of FIG. 3 is flexible or pliable (e.g., has elastic properties and/or characteristics), which enables the example seal 116 to contract or expand with the valve seat assembly 110 and/or the valve body 102 .
  • the example seal 116 of FIG. 3 is capable of providing a fluid seal in operational temperatures from about ⁇ 350 degrees Fahrenheit to about 1200 degrees Fahrenheit.
  • the example valve 100 may be used applications involving a wide range of temperatures, including cryogenic temperatures, high temperatures, etc.
  • the example seal 116 of FIG. 3 includes a guard 306 .
  • the guard 306 is disposed on a corner or edge 308 of the seal 116 to enable the guard 306 to initially contact the tapered portion 228 of the wall 224 of the valve body 102 as the seal 116 is lowered into the valve body 102 with the valve seat assembly 110 .
  • the example guard 306 protects the seal 116 from damage, abrasion and/or wear as the seal 116 slides along the tapered portion 228 of the wall 224 as the valve seat assembly 110 is lowered into the valve body 102 .
  • the guard 306 has an L-shaped cross-section. Other examples have other cross-sectional shapes (e.g., rounded or curved, etc.).
  • the seal 116 does not include the guard 306 .
  • FIG. 4 illustrates another example valve seat assembly 400 disclosed herein.
  • the valve seat assembly 400 includes a cage 402 , a valve seat 404 and a seal 406 .
  • the valve seat assembly 400 is disposed in a valve body 408 along a fluid flow passageway 410 . While the following examples are described in conjunction with the example valve body 408 of FIG. 4 , the example methods and apparatus disclosed herein may be implemented using other valves and/or valve bodies such as, for example, one or more valves or valve bodies described in U.S. application Ser. No. 13/599,762, entitled “Valve Seat Apparatus for Use with Fluid Valves,” filed on Aug. 30, 2012; U.S. application Ser. No. 13/828,539 entitled “Valve Seat Apparatus for Use With Fluid Valve;” and/or any other valve or valve body.
  • the example valve seat 404 is suspended in the valve body 408 via the cage 402 to be adjacent a wall 412 of the valve body 408 .
  • the cage 402 includes first threads 414 and the valve seat 404 includes second threads 416 to engage the first threads 414 .
  • the valve seat 404 is movably coupled to the cage 402 via the first and second threads 414 and 416 .
  • the example seal 406 is disposed between a flange 418 of the valve seat 404 and an end 419 of the cage 402 .
  • the seal 406 may be compressed by the flange 418 and the end 419 of the cage 402 along a first axis 420 (e.g., an axis substantially parallel to a longitudinal axis of the cage 402 ) by moving the valve seat 404 relative the cage 402 via the threads 414 , 416 .
  • the example seal 406 is also compressed or compacted by the valve seat 404 and the wall 412 of the valve body 408 along a second axis 422 (e.g., an axis substantially perpendicular to the longitudinal axis of the cage 402 ) to load the seal 406 .
  • the valve seat 404 includes female connectors 424 and 426 (e.g., recesses, cavities, etc.) to enable a valve seat adjustment apparatus 500 ( FIG. 5 ) to engage the valve seat 404 to thread or unthread the valve seat 404 and the cage 402 .
  • the example female connectors 424 and 426 of FIG. 4 are disposed on an underside 428 of the valve seat 404 (e.g., a side of the valve seat 404 defining an end of the valve seat 404 and/or the flange 418 ).
  • the valve seat 404 includes male connectors (e.g., protrusions) to enable the valve seat adjustment apparatus 500 to engage the valve seat 404 .
  • the cage 402 includes a first step 430 between the first threads 414 and the end 419 .
  • the example valve seat 404 includes a second step 432 between the second threads 416 and the flange 418 .
  • the first step 430 and the second step 432 function as a stop.
  • the second step 432 may contact the first step 430 to substantially prevent further threading of the valve seat 404 and the cage 402 .
  • the first step 430 contacts the second step 432 when the flange 418 is a predetermined distance from the end 419 of the cage 402 to prevent compression of the seal 406 beyond a threshold amount of compression.
  • FIG. 5 illustrates the example valve seat adjustment apparatus 500 , which may be used to load the example seal 406 of FIG. 4 while the valve seat assembly 400 is disposed in the valve body 408 .
  • the valve seat adjustment apparatus 500 includes a first bracket 502 and a hanger 504 .
  • the example first bracket 502 engages the valve seat 404 .
  • the first bracket 502 may be rotated to move the valve seat 404 relative to the cage 402 (e.g., thread or unthread the valve seat 404 and the cage 402 ).
  • the first bracket 502 includes a first beam or bar 506 .
  • Male connectors 508 and 510 are disposed on the first bar 506 .
  • the male connectors 508 and 510 are cylindrical protrusions extending from a surface 512 of the first bar 506 .
  • the male connectors 508 and 510 may be other shapes such as for example, rectangular, hexagonal, etc.
  • the male connectors 508 and 510 engage the female connectors 424 and 426 of the valve seat 404 to enable torque to be transferred from the valve seat adjustment apparatus 500 to the valve seat 404 .
  • the first bar 506 includes female connectors (e.g., recesses) to receive one or more male connectors (e.g., protrusions) of the valve seat 404 .
  • the example hanger 504 suspends or hangs the valve seat adjustment apparatus 500 from the valve body 408 , the cage 402 , and/or any other suitable portion of a valve component(s) and holds the first bracket 502 in engagement with the valve seat 404 .
  • the hanger 504 includes a first cable 514 and a second cable 516 .
  • the first cable 514 is coupled to a second beam or bar 518 adjacent a first end 520 of the second bar 518 .
  • the second cable 516 is coupled to the second bar 518 adjacent a second end 522 of the second bar 518 .
  • Other examples may include other numbers of cables (e.g., 1, 3, 4, 5, etc.).
  • a length of the second bar 518 is less than an inner diameter of the valve seat 404 and/or the cage 402 to enable the second bar 518 to be disposed within a space defined by the inner diameter of the valve seat 404 and/or the cage 402 while the first bracket 502 engages the valve seat 404 .
  • the example hanger 504 of FIG. 5 includes a first hook 524 coupled to the first cable 514 .
  • a second hook 526 is coupled to the second cable 516 .
  • the first hook 524 and the second hook 526 engage the cage 402 , the valve body 408 and/or any other suitable valve component(s) and/or fixture(s) to suspend the first bracket 502 in the valve body 408 .
  • Other examples may utilize other techniques to enable the hanger 504 to engage the valve to suspend the first bracket 502 in the valve body 408 .
  • Lengths of the example first cable 514 and the example second cable 516 are adjustable.
  • the first cable 514 is operatively coupled to a first buckle 528 .
  • the example second cable 516 is operatively coupled to a second buckle 530 .
  • the first buckle 528 and the second buckle 530 may be used to adjust a length of the first cable 514 and the second cable 516 , respectively, to lower the first bracket 502 or raise the first bracket 502 relative to the valve seat 404 .
  • the first and second buckles 528 and 530 may employ clasps, clamps, apertures through which the cables 514 and 516 are looped, pulleys, and/or any other suitable device and/or technique to enable the lengths of the cables 514 and 516 to be adjusted.
  • the example valve seat adjustment apparatus 500 of FIG. 5 includes a first coupling 532 and a second coupling 534 .
  • the first coupling 532 is disposed on a first side of the first bracket 502 .
  • the example second coupling 534 is disposed on a second side of the first bracket 502 opposite the first side.
  • the first coupling 532 and the second coupling 534 are hexagon-shaped protrusions (e.g., hex heads) to enable a first tool 536 and/or a second tool 700 ( FIG. 7 ) to engage the first bracket 502 and facilitate torquing of the first bracket 502 .
  • the first tool 536 is an open-end wrench.
  • first coupling 532 and/or the second coupling 534 may be other shapes to facilitate engagement of the first tool 536 and the first coupling 532 and/or the second coupling 534 .
  • first coupling 532 and the second coupling 534 are female connections such as, for example, keyed (e.g., hexagonal) recesses to receive the first tool 536 .
  • FIG. 6 illustrates the example valve seat adjustment apparatus 500 disposed in the valve body 408 of FIG. 4 .
  • the first hook 524 and the second hook 526 engage a lip 600 of the cage 402
  • the first bracket 502 is suspended in the valve body 408 below the valve seat assembly 400 in the orientation of FIG. 6 .
  • the example first bracket 502 may be lowered into the valve body 408 through a bore 602 of the cage 402 .
  • a flow control member e.g., a plug, a piston, etc.
  • a flow control member is decoupled and/or removed from the valve body 408 to facilitate disposal of the example valve seat adjustment apparatus 500 inside the valve body 408 .
  • the flow control member is coupled to the valve body 408 when the valve seat adjustment apparatus 500 is positioned into and/or disposed inside the valve body 408 .
  • the first bracket 502 is positioned in the valve body 408 via an inlet 604 or an outlet 606 of the valve body 408 , and the first cable 514 and the second cable 516 are fed through the bore 602 of the cage 402 to enable the first and second hooks 524 and 526 to engage the lip 600 of the cage 402 .
  • the first hook 524 and the second hook 526 engage other portion(s) of the valve seat assembly 400 and/or the valve body 408 , other valve component(s) and/or fixture(s).
  • FIG. 7 illustrates the example first bracket 502 of the valve seat adjustment apparatus 500 engaging the example valve seat 404 of FIG. 4 .
  • the lengths of the first cable 514 and the second cable 516 may be shortened via the buckles 528 and 530 to move the male connectors 508 and 510 of the valve seat adjustment apparatus 500 into engagement with the female connectors 424 and 426 of the valve seat 404 .
  • the example first bracket 502 may be rotated to thread or unthread the valve seat 404 and the cage 402 to move the valve seat 404 relative to cage 402 .
  • the first coupling 532 is accessible via the bore 602 of the cage 402 .
  • the first bracket 502 may be rotated by lowering a second tool 700 into the valve body 408 via the bore 602 of the cage 402 , engaging the first coupling 532 with the second tool 700 , and applying a sufficient amount of torque to the first coupling 532 via the second tool 700 .
  • the second coupling 534 is accessible via the inlet 604 of the example valve body 408 .
  • the first bracket 502 may be rotated by inserting the first tool 536 into the valve body 408 via the inlet 604 , engaging the second coupling 534 with the first tool 536 , and applying a sufficient amount of torque to the second coupling 534 via the first tool 536 .
  • the first bracket 502 is rotatably coupled to the second bar 518 to enable the second bar 518 to remain substantially stationary relative to the cage 402 to prevent the cables 514 and 516 from entangling while the first bracket 502 is rotated via the first tool 536 .
  • the first coupling 532 includes a neck 702
  • the example second bar 518 is rotatably coupled to the first bracket 502 via the neck 702 .
  • the second bar 518 may define an aperture through which the neck 702 extends, and the neck 702 provides an axis of rotation about which the first bracket 502 rotates relative to the second bar 518 .
  • the valve seat 404 moves relative to the cage 402 to compress or decompress the seal 406 .
  • a position of the valve seat 404 is adjustable relative to a position of the cage 402 , and a torque applied to the first bracket 502 may be controlled to control an amount of rotation of the valve seat 404 and, thus, compression of the seal 406 . Therefore, the example valve seat adjustment apparatus 500 may be used to load the seal 406 to enable the seal 406 to provide a fluid seal against the valve body 408 .
  • FIG. 8 illustrates another example valve seat assembly 800 disclosed herein.
  • the valve seat assembly 800 includes a cage 802 , a valve seat 804 and a seal 806 .
  • the example valve seat 804 of FIG. 1 is coupled to the cage 802 .
  • the valve seat 804 is coupled to the cage 802 via first threads 808 .
  • the valve seat 804 is coupled to the cage 802 via other techniques (e.g., welding, mechanical fasteners such as, for example, bolts, etc.).
  • the valve seat 804 defines a recess 810 in which the seal 806 is disposed.
  • the valve seat 804 includes a flange 812 and a retainer 814 to define the recess 810 .
  • the seal 806 is interposes the flange 812 and the retainer 814 .
  • the retainer 814 is movably coupled to the valve seat 804 via second threads 816 to enable the retainer 814 to load the seal 806 .
  • the example retainer 814 also enables the seal 806 to be clamped between the retainer 814 and the flange 812 prior to the example valve seat assembly 800 being disposed in the valve body 818 to facilitate assembly of the valve seat assembly 800 outside of a valve body 818 .
  • the retainer 814 includes female connections 820 and 822 (e.g., recesses, cavities, etc.) to enable the example valve seat adjustment apparatus 500 of FIG. 5 to engage the retainer 814 and move the retainer 814 toward the cage 802 via the second threads 816 .
  • the seal 806 As the retainer 814 compresses the seal 806 against the flange 812 , the seal 806 is urged to expand toward the valve body 818 . As a result, the seal 806 is compressed or compacted by the valve body 818 and valve seat 804 , thereby loading the seal.
  • a first side 824 of the seal 806 is in contact with the flange 814
  • a second side 826 of the seal 806 is in contact with the retainer 814
  • a third side 828 of the seal 806 is in contact with the valve seat 804
  • a fourth side 830 of the seal 806 is in contact with the valve body 818 .
  • the example seal 806 is compressed between the first side 824 and the second side 826 and between the third side 828 and the fourth side 830 .
  • the valve seat 804 functions as a stop (e.g., provides a motion limit) to the retainer 814 .
  • a stop e.g., provides a motion limit
  • the retainer 814 threads into the valve seat 804 .
  • an end 832 of the retainer 814 initially contacts the seal 806 . If the retainer 814 is further threaded into the valve seat 804 , the end 832 of the retainer 814 may contact the valve seat 804 , thereby substantially preventing further threading of the retainer 814 and, thus further compression of the seal 806 .
  • FIG. 9 A flowchart representative of an example method 900 for assembling a valve is shown in FIG. 9 .
  • the example method 900 is described with reference to the flowchart illustrated in FIG. 9 , many other methods to assemble a valve may alternatively be used.
  • the order of execution of the blocks may be changed, and/or some of the blocks described may be changed, eliminated, or combined.
  • the method 900 of FIG. 9 begins at block 902 by disposing a seal between a first surface and a second surface of a valve seat assembly.
  • the seal 116 of FIG. 1 may be disposed between the ledge 218 of the valve seat 112 and the end 206 of the cage 114 .
  • the end 206 of the cage 114 contacts the first side 232 of the seal 116
  • flange 210 of the valve seat 112 contacts the second side 234 of the seal 114 .
  • the seal 406 is disposed around the valve seat 404 , and the valve seat 404 is threaded into the cage 402 to dispose the seal 406 between the flange 418 and the end 419 of the cage 402 .
  • the seal 806 is disposed in the recess 810 of the valve seat 804 , and the retainer 814 is threaded into the valve seat 804 to dispose the seal 806 between the retainer 814 and the flange 812 .
  • the example valve seat 804 of FIG. 8 may then be coupled to the cage 802 to form the valve seat assembly 800 .
  • the valve seat 804 is coupled to the cage 802 prior to disposing the seal 806 between the retainer 814 and the flange 812 .
  • the seal is compressed between the first surface and the second surface of the valve seat assembly.
  • the second threads 202 of the valve seat 112 may be threaded with the first threads 200 of the cage 114 to hold and/or compress the seal 116 between the flange 210 and the end 206 of the cage 114 .
  • the example seal 116 of FIGS. 1-3 is then further compressed between the end 206 of the cage 114 and the ledge 218 of the valve seat 208 as the valve seat assembly 110 lowers into the valve body 102 .
  • the seal 116 compresses between the end 206 of the cage 114 and the ledge 218 .
  • valve seat adjustment apparatus 500 is suspended in the valve body 408 to engage the valve seat 404 when the valve seat assembly 400 is disposed inside the valve body 408 .
  • Torque may be applied to the valve seat adjustment apparatus 500 via the first tool 536 and/or the second tool 700 to move the flange 418 of the valve seat 404 toward the end 419 of the cage 402 via the threads 414 to compress the seal 406 between the flange 418 and the end 419 of the cage along the first axis 420 .
  • the retainer 814 is threaded into the valve seat 804 via valve seat adjustment apparatus 500 to compress the seal 806 between the retainer 814 and the flange 812 .
  • the seal is compressed between a third surface of the valve body and a fourth surface of the valve seat assembly to load the seal.
  • the example seal 116 compresses between the first portion 208 of the valve seat 112 and the second bore 230 of the wall 224 to load the seal 116 .
  • the four sides 232 , 234 , 236 , 238 of the example seal 116 are in contact with the example valve 100 when the seal 116 is loaded.
  • the example seal 406 of FIG. 4 is loaded by moving the flange 418 of the valve seat 404 toward the end 419 of the cage 402 to further compress the seal 406 between the flange 418 and the end 419 of the cage along the first axis 420 .
  • the seal 406 is compressed along the first axis 420 , the seal is urged to expand along the second axis 422 .
  • Expansion of the seal 406 along the first axis 420 enables the seal 406 to also be compressed or compacted between the wall 412 of the valve body 408 and the valve seat 404 along the second axis 422 , thereby loading the seal 406 .
  • the example seal 406 is loaded, the example seal 406 is compressed along both the first axis 420 and the second axis 422 .
  • the retainer 814 is employed to enable the seal 806 to be compressed between the example valve seat 804 and the example valve body 818 .
  • the retainer 814 moves toward the flange 812 to compress the seal 806 .
  • the seal 806 is urged to expand toward the valve body 818 and the valve seat 804 .
  • the valve seat valve seat 804 and the valve body 818 contact the third side 828 and the fourth side 830 of the seal 806 , respectively, and compress the seal 806 between the valve seat 804 and the valve body 818 .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Temperature-Responsive Valves (AREA)
  • Valve Housings (AREA)
  • Sliding Valves (AREA)
US13/895,973 2013-03-14 2013-05-16 Valve seat assemblies Active 2033-06-30 US9297469B2 (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US13/895,973 US9297469B2 (en) 2013-03-14 2013-05-16 Valve seat assemblies
CN201410090069.8A CN104048051B (zh) 2013-03-14 2014-03-06 阀座组件
CN201420112626.7U CN204061942U (zh) 2013-03-14 2014-03-06 阀座装置及阀座调节装置
KR1020157028799A KR101769289B1 (ko) 2013-03-14 2014-03-10 밸브 시트 조립체
AU2014241307A AU2014241307B2 (en) 2013-03-14 2014-03-10 Valve seat assemblies
PCT/US2014/022255 WO2014159156A2 (en) 2013-03-14 2014-03-10 Valve seat assemblies
CA2905286A CA2905286C (en) 2013-03-14 2014-03-10 Valve seat assemblies
EP14718801.5A EP2971881A2 (en) 2013-03-14 2014-03-10 Valve seat assemblies
MX2015012968A MX363329B (es) 2013-03-14 2014-03-10 Montajes de asientos de valvulas.
BR112015022127A BR112015022127A2 (pt) 2013-03-14 2014-03-10 conjuntos de sede de válvula
RU2015141356A RU2664051C2 (ru) 2013-03-14 2014-03-10 Узлы клапанного седла
JP2016500928A JP6336028B2 (ja) 2013-03-14 2014-03-10 弁座アセンブリ
NO20151189A NO343562B1 (en) 2013-03-14 2015-09-15 Valve seat assemblies

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US13/828,539 US9267604B2 (en) 2013-03-14 2013-03-14 Valve seat apparatus for use with fluid valves
US13/895,973 US9297469B2 (en) 2013-03-14 2013-05-16 Valve seat assemblies

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